Question

You are traveling to a football game. You tell your friends you traveled 70 miles per hour while on the interstate. You know however, that at one point you glanced at your speedometer and it read 68 miles per hour. Which is your average speed and which is your instantaneous speed?

Answer 1

The average speed is 70 miles per hour and the instantaneous speed is 68

miles per hour.

The average speed is the total distance travelled divided by the elapsed time

while the instantaneous speed is the accurate speed covered by the object

at a given instant of time.

Mathematically,

average speed = total distance travelled by the object / total time taken by

the object

Instantaneous speed = distance of an instant / time of an instant.

Therefore,

The average speed is 70 miles per hour.

The instantaneous speed is 68 miles per hour.

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